Javascript wrong date format

Question

I format a date object from a string in javascript but but when i print the formatted date i found it increased two years !!

alert("Date1-Without-conversion:" + document.getElementById(arr[0]).value);
alert("Date2-Without-conversion:" + document.getElementById(arr[1]).value);

it prints:

30/9/2018
04/10/2018

date1Str=document.getElementById(arr[0]).value;
date2Str=document.getElementById(arr[1]).value;

date1 = new Date(date1Str);
date2 = new Date(date2Str);

alert("Date1-After-conversion:" + date1);
alert("Dat2-After-conversion:" + date2);

prints:

Tue Jun 09 2020 00:00:00 GMT+0200(Egypt Standard Time)
Tue Apr 10 2018 00:00:00 GMT+0200(Egypt Standard Time)

the problem is that when i used:

date1.getFullYear() OR `date2.getFullYear()` it prints 2020 !!!

How come ??

My guess - it is converting the month 30 to 12*2 + 6, which is june, 2 years ahead. Hence the result — karthikr
– karthikr, Commented Sep 9, 2013 at 17:31
Just want to add that your code is reading your dates wrong, it is looking at the first number as the month, not as the day. For example, your seconds date is read as April, when you really want October. — Jordan
– Jordan, Commented Sep 9, 2013 at 17:31
I recommend using Moment.js. It is now one of my "standard" libraries whenever I have to deal with dates or times - and makes parsing of custom formats easy (and explicit) as well as being able to detect invalid dates. — user2246674
– user2246674, Commented Sep 9, 2013 at 17:57

Jim W · Accepted Answer · 2013-09-09 17:36:45Z

2

Date's parsing leaves something to be desired, as the comments note. You can use this constructor to be succinct

new Date(year, month [, date [, hours[, minutes[, seconds[, ms]]

answered Sep 9, 2013 at 17:36

Jim W

5,0261 gold badge31 silver badges46 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Bart · Accepted Answer · 2013-09-09 17:44:47Z

1

You need to parse the date by parts.

var date1 = new Date(day, month, year);

For 30/9/2018:

var date1 = new Date(30, 9, 2018);

edited Sep 9, 2013 at 17:44

Bart

2,07016 silver badges19 bronze badges

answered Sep 9, 2013 at 17:39

sudhansu63

6,2204 gold badges41 silver badges55 bronze badges

1 Comment

user2246674 Over a year ago

new Date(30, ..) will be off by two millennium!

Collectives™ on Stack Overflow

Javascript wrong date format

2 Answers 2

Comments

1 Comment

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

1 Comment

Your Answer

Sign up or log in

Post as a guest

Linked

Related